Similar or same problem here (ThinkPad X61 tablet) I use the tablet as multi-user.
On "first" user [ctrl+alt+f7] the pen does not work On "second" user [ctrl+alt+f8] the pen works. So, it's not a hardware issue. I don't know if it helps: /var/log/Xorg.2.log:[ 15853.585] (EE) PreInit returned 8 for "Serial Wacom Tablet stylus" -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xf86-input-wacom in Ubuntu. https://bugs.launchpad.net/bugs/234466 Title: [hardy] Pen crazy in tablet PC To manage notifications about this bug go to: https://bugs.launchpad.net/linuxwacom/+bug/234466/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp